Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate
2001-06-15
2008-08-26
Bomar, Shane (Department: 3676)
Boring or penetrating the earth
With below-ground tool drive prime mover
Fluid rotary type
C175S106000, C415S903000
Reexamination Certificate
active
07416034
ABSTRACT:
The invention relates to a drive system, in particular a downhole drilling assembly (10). In the preferred embodiment, a bearing mechanism (14, 24) of the assembly (10) is isolated from a gear mechanism (20) of the assembly (10), to prevent failure of the bearing mechanism (14, 24) due to vibration and heat generated by the gear mechanism (20) in use. A lower bearing unit (24) of the bearing mechanism (24) is coupled to the gear mechanism (20) by a shock eliminating coupling assembly (22), which prevents the transmission of shock loads to the gear mechanism (20). Also, the gear mechanism (20) is coupled through a shock eliminating coupling assembly (18) to a turbine (16) and thus to an upper bearing unit (14). Sealing assemblies (60, 116) are provided for the gear mechanism (20) and the upper bearing unit (14) to prevent drilling fluid ingress and consequent damage. The assembly (10) may also carry a torsionally flexible drive shaft (46).
REFERENCES:
patent: 2626780 (1953-01-01), Ortloff
patent: 2654572 (1953-10-01), Arutunoff
patent: 2990895 (1961-07-01), Works et al.
patent: 3365170 (1968-01-01), Whittle
patent: 4222445 (1980-09-01), Vadetsky et al.
patent: 4329127 (1982-05-01), Tschirky et al.
patent: 4388973 (1983-06-01), Winkelmann et al.
patent: 4683964 (1987-08-01), Wenzel
patent: 1 257 865 (1989-07-01), None
patent: 2 073 285 (1981-10-01), None
patent: 2052065 (1996-01-01), None
patent: 2057882 (1996-04-01), None
patent: 2112855 (1998-06-01), None
patent: 114136 (1958-01-01), None
patent: 428074 (1974-05-01), None
patent: 620578 (1978-08-01), None
patent: 577823 (1981-03-01), None
patent: 977668 (1982-11-01), None
patent: 1093779 (1984-05-01), None
patent: 1104226 (1984-07-01), None
patent: WO-98/20228 (1998-05-01), None
International Search Report for PCT/GB01/02679 completed Oct. 3, 2001.
First Official Action w/Translation from the Russian Patent Office.
Theory and Technique of Turbodrilling, Ionesyn P.A., 1953, Moscow.
Downie Andrew McPherson
Pezzani Guido Ernesto
Alston & Bird LLP
Bomar Shane
Smith International Inc.
LandOfFree
Drive system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3998437